{include file="index@/public/header" /}
<style>
	body {
		background: #e1e0de;
		color: #333333 !important;
	}

	* {
		box-sizing: border-box;
	}

	h1,
	h2,
	h3,
	h4 {
		font-weight: 700 !important;
	}

	.layui-card-header {
		width: 100%;
		border-bottom: 1px solid #999 !important;
		padding-left: 5px;
	}

	.layui-card {
		padding: 10px 20px 50px;
	}

	

	.layui-container {
		padding: 0 !important;
	}

	img {
		max-width: 100%;
	}

	::-moz-selection {
		background: #cccccc;
		color: #ffffff;
	}

	::selection {
		background: #cccccc;
		color: #ffffff;
	}

	.layui-breadcrumb {
		padding-left: 5px;
		text-decoration: none !important;
	}

	.layui-card h1 {
		margin: 10px auto 0;
	}

	.description {
		font-size: 15px;
		font-weight: bold;
		margin: 20px 0;
	}

	.layui-col-xs1,
	.layui-col-sm1,
	.layui-col-md1,
	.layui-col-lg1,
	.layui-col-xs2,
	.layui-col-sm2,
	.layui-col-md2,
	.layui-col-lg2,
	.layui-col-xs3,
	.layui-col-sm3,
	.layui-col-md3,
	.layui-col-lg3,
	.layui-col-xs4,
	.layui-col-sm4,
	.layui-col-md4,
	.layui-col-lg4,
	.layui-col-xs5,
	.layui-col-sm5,
	.layui-col-md5,
	.layui-col-lg5,
	.layui-col-xs6,
	.layui-col-sm6,
	.layui-col-md6,
	.layui-col-lg6,
	.layui-col-xs7,
	.layui-col-sm7,
	.layui-col-md7,
	.layui-col-lg7,
	.layui-col-xs8,
	.layui-col-sm8,
	.layui-col-md8,
	.layui-col-lg8,
	.layui-col-xs9,
	.layui-col-sm9,
	.layui-col-md9,
	.layui-col-lg9,
	.layui-col-xs10,
	.layui-col-sm10,
	.layui-col-md10,
	.layui-col-lg10,
	.layui-col-xs11,
	.layui-col-sm11,
	.layui-col-md11,
	.layui-col-lg11,
	.layui-col-xs12,
	.layui-col-sm12,
	.layui-col-md12,
	.layui-col-lg12 {
		padding-right: 5px;
		padding-left: 5px;
	}

	.layui-textarea {
		resize: none !important;
	}

	@media screen and (max-width: 800px) {
		.layui-card-header {
			line-height: normal !important;
			font-size: 10px !important;
		}

		.content-bottom {
			flex-direction: column;
		}
	}

	.Bearings-content-header {
		padding: .3rem;
	}

	.Bearings-content-headerC {
		font-size: 18px;
		background-color: #F6F6F6;
		padding: 10px 10px;
	}

	.Bearings-content-font {
		display: inline-block;
		font-size: 0.775rem;
		padding: .5rem;
		line-height: 1.1rem;
	}

	.Bearings-content-button {
		display: flex;
		justify-content: space-around;
		align-items: center;
		margin-top: .4rem;
	}

	.Bearings-content-buttonT {
		margin-top: .8rem;
	}

	.Bearings-content-button a {
		width: 13rem;
		height: 3.125rem;
		text-decoration: none;
		border: 1px solid #ccc;
		border-radius: 8px;
		color: #333;
		display: flex;
		justify-content: center;
		align-items: center;
	}

	.Bearings-content-button a:hover {
		border: 1.5px solid #36648A;
	}

	.layui-breadcrumb-a {
		font: 12px/14px arial, helvetica, sans-serif;
		color: #36648A !important;
	}

	.layui-breadcrumb-b cite {
		font: 12px/14px arial, helvetica, sans-serif;
		color: #333333 !important;
	}

	/* WHD */
	table {
		font-size: 0.75rem;
	}

	table tr td {
		padding: .5rem;
	}

	tr {
		background-color: white;
	}
	
	.Bearings-content-child-one tr:nth-child(n+3):hover{
		background-color: #36648A;
		color: white;
	}
	.Bearings-content-child-one tr:nth-child(3):hover td:nth-child(1){
		background-color: white;
		color: #333333;
	}
	.Bearings-content-child-one tr:nth-child(6):hover td:nth-child(1){
		background-color: white;
		color: #333333;
	}
	.Bearings-content-child-two tr:nth-child(n+2):hover{
		background-color: #36648A;
		color: white;
	}
	
	
	.Bearings-content-title {
		font-size: 18px;
		background-color: #F6F6F6;
		padding: 10px 10px;
		margin: 15px 0 0;
	}

	.Bearings-content-font {
		padding: 1rem;
		box-sizing: border-box;
		display: inline-block;
		font-size: 0.775rem;
		line-height: 1.1rem;
	}

	.Bearings-content-font>div {
		margin: 3rem 0;
	}
	
	.Bearings-content-font p strong{
		font-size: 0.875rem;
		font-weight: 400;
	}
	.Bearings-content-font>div>p{
		margin: .5rem 0;
	}
	/* .Bearings-content-font>p:nth-child(2){
		margin-top: 3rem;
	} */
</style>
<div class="layui-container" style='font: 12px/14px arial,helvetica,sans-serif;'>
	<div class="layui-card">
		<span class="layui-breadcrumb" lay-separator="/">
      <a href="/" style="font: 12px/14px arial,helvetica,sans-serif;">{:lang('Home')}</a>
      {foreach $crumbs as $k=>$v }
      <a href="/{$v['crumbs_url']}" style="font: 12px/14px arial,helvetica,sans-serif;color:#36648A">{$v['alias_name']}</a>
      {/foreach}
    </span>
		<div class="layui-card-header">
			<h1>{:lang('Ball Bearing Noise')}</h1>
		</div>

		<!-- content -->
		<div class="Bearings-content">
			<div class="Bearings-content-font">
				<p>{:lang("Bearing acoustical noise is a function of both the bearing itself and the way in which it is used. Bearings can be specified as 100% noise-tested during manufacture. Bearing noise is not generally influenced by ABEC precision, but rather by manufacturers' internal quality standards, particularly raceway finish. There are no fixed reference standards among manufacturers for noise testing.")}</p>
				<div>
					<p><strong>{:lang('NOISE TESTING')}</strong></p>
					<p>{:lang('The standard instrument used for bearing noise testing is the Anderon Meter (sometimes called Anderometer) made by Sugawara Laboratories. This measures noise with an accelerometer contacting the outer race of the bearing while the inner race is rotated at 1800 RPM. Noise levels are separated into 3 bands, designated as follows')}:</p>
					<div>
						<p>

							{:lang('High band')} 1,800 - 10,000 Hz </p>
						<p>
							{:lang('Medium band')} 300 - 1,800 Hz</p>
						<p>
							{:lang('Low band')} 50 - 300 Hz</p>
					</div>
				</div>
				
				<p>
					{:lang('According to the type of bearing (material and noise grade), a different attenuation is used for each band. Meters are calibrated in Anderons. Standard testing procedure requires that bearings are washed clean of any lubricant and 2 drops of fresh MIL-L-6085A oil lubricant added prior to testing.')}</p>
				<p>
					{:lang('Typical attenuation values for each band are given in the table below, according to bearing material and noise grade. A "pass" for any bearing grade is defined as < 40% of full scale on the Anderon meters for each band. In this case, this translates to pass levels of Low < 6.4, Med < 2.4, High < 3.2.')}</p>
						<div class="Bearings-content-child-one">
							<table cellpadding="5" cellspacing="0" border="1 soild">
								<tbody>
									<tr class="text">
										<td colspan="5">{:lang('Anderon Meter attenuation settings')}:</td>
									</tr>
									<tr class="text">
										<td width="106">{:lang('Material')}</td>
										<td width="88" align="center">{:lang('Noise rating')}</td>
										<td width="84" align="center">{:lang('Low band')}</td>
										<td width="83" align="center">{:lang('Mid band')}</td>
										<td width="93" align="center">{:lang('High band')}</td>
									</tr>
									<tr class="text">
										<td rowspan="3">{:lang('52100chromesteel')}</td>
										<td align="center">{:lang('None')}</td>
										<td align="center">16</td>
										<td align="center">6</td>
										<td align="center">8</td>
									</tr>
									<tr class="text">
										<td height="27" align="center">E</td>
										<td align="center">16</td>
										<td align="center">6</td>
										<td align="center">8</td>
									</tr>
									<tr class="text">
										<td align="center">ER</td>
										<td align="center">12</td>
										<td align="center">6</td>
										<td align="center">8</td>
									</tr>
									<tr class="text">
										<td rowspan="3">{:lang('440C/Martensiticstainless')}</td>
										<td align="center">{:lang('None')}</td>
										<td align="center">16</td>
										<td align="center">10</td>
										<td align="center">24</td>
									</tr>
									<tr class="text">
										<td align="center">E</td>
										<td align="center">16</td>
										<td align="center">10</td>
										<td align="center">24</td>
									</tr>
									<tr class="text">
										<td align="center">ER</td>
										<td align="center">16</td>
										<td align="center">8</td>
										<td align="center">10</td>
									</tr>
									<tr class="text">
										<td colspan="5">{:lang('ANDERON meter')} &lt; 40% = {:lang('Good bearing')}</td>
									</tr>
								</tbody>
							</table>
						</div>
						<div class="Bearings-content-child-two">
							<table cellpadding="5" cellspacing="0" border="1">
								<tbody>
									<tr class="text">
										<td width="126">{:lang('DYNAROLL CODE')}</td>
										<td width="365">{:lang('NOISE TESTING LEVEL')}</td>
									</tr>
									<tr class="text">
										<td>{:lang('No Code')}</td>
										<td>{:lang('Standard bearing - not noise tested')}</td>
									</tr>
									<tr class="text">
										<td>E</td>
										<td>{:lang('Noise tested to meet electric motor quality quietness standards.')}</td>
									</tr>
									<tr class="text">
										<td>ER</td>
										<td>{:lang('Ultra low noise tested to spindle motor quietness standards.')}</td>
									</tr>
								</tbody>
							</table>
						</div>
			</div>

		</div>
	</div>


</div>



{include file="index@/public/footer" /}
